Oil-burner.



R. G. GREATHEAD.

OIL BURNER.

APPLICATION FILED DEC. 10, 1913.

Patented Nov. 24, 1914.

RIM mu H 2 S w [Q E t H w M 0 4 WITNESSES R. G. GREATHEADL OIL BURNER.

APPLICATION FILED DEC. 10, 1913.

Patented NOV. 24, 1914.

2 SHEETSSHEET 2.

IN VENTOR, Robert 6. (Treat/wad WITNESSES ATTORNEY ROBERT G. GREATHEAD,0F VALLEJO, CALIFORNIA.

OIL-BURNER.

Application filed December 10, 1913.

To all whom it may concern Be it known that I, ROBERT G. GREAT- HEAD, acitizen of the United States, residing at Vallejo, in the county ofSolano and State of California, have invented new and usefulImprovements in Self-Adjusting Oil- Burners, of which the following is aspecification.

The present invention relates to improvements in oil burners, the objectof the inven tion be ng to provide a burner which will beself-regulating as regards the amount of steam and oil supplied to theburner and will also burn without smoke.

In the accompanying drawing, Figure 1 is a central longitudinal sectionof the burner; Fig. 2 is a cross section on the line 22 of Fig. 1; Fig.3 is an end view of the burner mouth; Fig. 4 is a partial longitudinalsection of a modification of my invention; Fig. 5 is a cross section onthe line 55 of Fig. 1.

Referring to the drawing, 1 indicates the main casting of my improvedoil burner, having an enlarged cylindrical base portion 2, and acontracted cylindrical burner portion 3. In said base portion andleading into the burner portion is a steam conduit 4 connected with asteam pipe 6. An internally thickened portion 7 of the casting isthreaded, as shown at 8, and screwed thereinto is the innerend of acylindrical wall 9, forming, with the wall of the burner portion, anannular steam chamber 11. The outer end of said cylindrical wall 9flares outwardly, so as to form, with the inwardly converging outer endof the cylindrical burner portion 3 of the casting, a narrow annularsteam outlet 12. Near its inner end there extends outwardly from saidcylindrical wall 9 a circular flange 13 which fits snugly at its outeredge against the inner surface of the cylindrical wall of the burnerportion 3, and between said flange and said thickened portion 7 of theburner wall is a valve chamber 14, in which is an annular steam valve16. From said valve chamber a circular series of steam ports 17 leadinto the annular steam chamber 11 the steam from said valve chamber 14obtaining access to said ports 17 by means of a circular series ofpassages 18 in the valve, said valve being,

' by means to be presently described, moved in an axial direction tovary the extent of registry of said passages 18 -with the ports 17.

Specification of Letters Patent.

Patented Nov. ea, 1914.

Serial No. 805.735.

Goaxially within the cylindrical wall 9 is a cylindrical wall 19, fromwhich extend in a radial direction longitudinal guide ribs 21, the outerportions of which abut against the inner surface of the wall 9, so thatsaid rlbs divide the annular space between the walls 9 and 19 intolongitudinally extending compartments 22. Said compartments communicateat their inner ends with an oil chamber 23 into which, by a conduit 24,oil flows from an oil pipe 26. At their outer ends they communicate witha chamber 27 which in turn communicates with a narrow, conical annularoutlet 28 for the oil, formed between the outwardly sloping terminalportion of the wall 9 and the conical outwardly flaring end of the wall19 which thus form an oil valve. At the inner end of the wall 19 andintegral therewith, is ahead 29, and clamped to'said head by a nut 31screwed on a reduced threaded portion of the head is the central portionof a thin, brass disk or diaphragm 32, the peripheral portion of whichis clamped between the base portion 2 of the casting and a cylinder 33,by screws 34, extending through said cylinder and diaphragm and screwedinto the casting. The diaphragm 32 being secured to the wall 19 makes aclosure on one side for the oil chamher which allows said wall to bemoved backward and forward without friction;

center of the diaphragm 36, and also extending slidably through astufiing box 44 in the center of a web 46, formed integral with thecylinder 33, said tube 40 having at its inner end a reduced portionforming a shoulder 47, abutting against a side of the head 29, a nut 48being screwed on a threaded portion of the tube on the other side ofsaid head. Into the chamber 49 between the web 46 and the diaphragm 36leads a steam pipe 51, and a compressedcoiled spring 52 rests betweenthe stufling box 43 and the hub-35.

Extending through the tube 40 is a' rod 52 having at one end a reducedthreaded portion 53 screwed in a bearing 5a secured to the hand wheel lland having thereon a hand wheel 56. At its other end the rod 52 issecured to an air guide 57, which, in the form of the inventionillustrated in Fig. 1, has radially extending ribs 58 abutting againstthe inner surface of the wall 19 and terminating in a conical outwardlyflaring deflector '29, which, with the outwardly flaring inner surfaceof the wall 19, forms a conical annular air outlet 61. In the form ofthe invention shown in Fig. 4 there are secured on said rod 52 flatperforated disks 62 spaced apart by tubes 63, and, on the end of the rod52 a concavo-convex disk 61 also perforated. By means of these diskstheair while supplied in sufficient quantity is prevented from flowingoutward with too great force. Air is supplied to the interior of saidwall 19 through holes 66 in the head 29 from an air chamber 67 betweenthe diaphragm 32 and the web 46 and communi eating with the atmosphereby holes 68 through the cylinder 33. A steam pipe 69 extending throughone of these holes and discharging through a hole 66 in the head 29 isused when necessary to clean out the air conduit and in like manner apipe 71, leading into the oil chamber 23, is used to clean out the oilchamber and oil conduit.

The extent of registry of the openings 18 with the passages 17 isregulated by means .of three stems 72 attached at one end to the annularvalve 16, passing through stuifing boxes 73 and carrying at their outerends each two spaced disks 74; between which extends a spur ring 76meshing with a worm 77 on a shaft 78 (see Fig. 5) extending through abearing 79 and stuiiing box 81 to the outside of the burner, and havingthereon a handle 82 by which it can be turned. Said spur ring is screwedupon a threaded portion 83 of the wall 19. By turning the handle 82 theworm 77 can be rotated, to rotate the spur ring 76, causing it to bescrewed upon the wall 19, thus causing the stems 72, and also the valvering 16, to be moved longitudinally and thus varying the extent ofregistry of the openings 18 with the passages 17. i

As the steam pressure in the boiler falls, the pressure on the innerside of the diaphragm 36 also falls, permitting the coiled spring 52 ofthe outer side thereof to press it inward, thus enlarging the oiloutlet. At the same time the extent of registry of the passages of theopenings 18 with the passages 17 is increased, so that the supply ofsteam to the burner nozzle is also increased. Conseuuently, the fireunder the boiler is increased and the steam pressure is automaticallyrestored. An undue increase of the steam pressure.in the boiler causesthe fire 1 o liliminish and the steam pressure to again While, however,the steam pressure is thus automatically maintained constant, it will beseen that the supply of oil, steam, and air, can each be variedindependently when desired. Moreover the oil, air and steam valves mayeach be adjusted while the burner is in operation, and the steam jets 69and 71, for blowing out any foreign matter from the oil and air valvescan also be used while the burner is in operation.

By reason of the oil flowing into the burner by gravity and in a coldcondition, all of its more volatile gases are retained in the oil untildrawn from the burner by the suction of the steam leaving the nozzle,and thus the most effective combustion of the oil takes place. The oilis all consumed, and a great saving of oil is the result, besides anutter absence of smoke.

I claim 1. In an oil burner, an oil conduit, an annular chamber aroundthe oil conduit, a circular series of steam passages leading from asource of supply of steam to said steam chambers, a valve ring aroundsaid series and having a circular series of holes adapted to registerwith said passages, a

diaphragm movable by the pressure of said steam from the source ofsupply, an operative connection between said diaphragm and ring,whereby, when the pressure of the steam is increased, the openings tothe passages are contracted, and conversely, and means for adjustingsaid operative connection by hand to vary the extent of said openings.

2. An oil burner having an annular steam chamber, a tubular wall guidedwithin and spaced from a wall of said steam chamber to form therewith anoil conduit, an oil valve connected with said tubular wall, a diaphragmsecured to the inner end. of said tubular wall to movably support thesame, said oil burner having an air chamber on the side of saiddiaphragm remote from said oil chamber, a head at one end of said wallhaving an aperture communicating with said air chamber, an air deflectorat the other end within said oil valve, and a diaphragm operativelyconnected to said tubular wall and forming a movable wall of a steamchamber, whereby said wall is moved longitudinally by the pressure ofsteam in said chamber.

3. An oil burner having an oil valve connected with said wall, adiaphragm secured to the inner end of said wall to movably support thesame, said oil burner having an air chamber on the side of saiddiaphragm remote from said oil chamber, and said wall communicating atone end through an apertured head with said air chamber, an an deflectorat the other end within said oil valve, and a diaphragm operativelyconnected to said Wall and forming a movable Wall of a steam chamber,whereby said wall is moved longitudinally by the pressure of steam insaid chamber.

4. An oil burner having an annular steam chamber, a cylindrical wallcoaxial with, guided within, and spaced from, said steam chamber to formtherewith an oil conduit, an oil valve connected with said wall, adiaphragm secured to the inner end of said wall to movably support'thesame, and form a movable wall of an oil chamber, said oil burner havingan air chamber on the side of said diaphragm remote from said oilchamber, and said first-named wall having at one end an apertured headcommunicating with said air chamber, an air deflector at the other endwithin said oil valve, and a diaphragm operatively connected to saidwall and forming a movable wall of a steam chamber, whereby said wall ismoved longitudinally by the pressure of steam in said chamber.

5. An oil burner having an annular steam chamber, a cylindrical wallcoaxial with, guided within, and spaced from, said steam chamber to formtherewith an oil conduit, an oil valve connected with said wall, adiaphragm secured to the inner end of said wall to movably support thesame, and form a movable wall of an oil chamber, said oil burner havingan air chamber on the side of said diaphragm remote from said oilchamber, and said first-named wall having at one end an apertured headcommunicating with said air chamber, an air deflector at the other endwithin said oil valve, a

diaphragm operatively connected to said wall and forming a movable wallof a steam chamber, whereby said wall is moved longitudinally by thepressure of steam in said chamber, and means for independently movingsaid wall.

6. An oil burner having an annular steam chamber, a cylindrical wallcoaxial with, guided within, and spaced from, said steam chamber to formtherewith an oil conduit, an oil valve connected with said wall, adiaphragm secured to the inner end of said wall to movably support thesame, and form a movable wall of an oil chamber, said oil burner havingan air chamber on the side of said diaphragm remote from said oilchamber, and said first-named wall having at one end an apertured headcommunicating with said air chamber, an air deflector at the other endwithin said oil valve, a diaphragm operatively connected to said walland forming a movable wall of a steam chamber, whereby said Wall ismoved longitudinally by the pressure of steam in said chamber, and meansfor independently varying the size of the passage for the steam to theburner.

7. An oil burner having an annular steam chamber, a. cylindricalwallcoaxial with, guided within, and spaced from, said steam chamber toform therewith an oil conduit, an oil valve connected with said wall, adiaphragm secured to the inner end of said wall to movably support thesame, and form a movable wall of an oil chamber, said oil burner havingan air chamber on the side of said diaphragm remote from said oilchamber, and said first-named wall having at one end an apertured headcommunicating with said air chamber, an air deflector at the other endwithin said oil valve, means for adjusting said deflector, and adiaphragm operatively connected to said wall and "forming a movable wallof a steam chamber,whereby said wall is moved longitudinally by thepressure of steam in said chamber. 1

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

ROBERT Gr. GREATHEAD. Witnesses GEORGE E. MASON, CHARLES E. ZANDER.

